/* ButtonScope instrument interface. No external fonts or frameworks. */
/* CMS already reserves toolbar space on html; keep this in-flow header in place. */
html.cms-has-admin-bar .site-header{top:0!important}
:root{color-scheme:dark;--bg:#0c172a;--panel:#142238;--panel2:#1b2c43;--ink:#f0f4f9;--muted:#aebed0;--line:#304159;--lime:#c8f56b;--cyan:#77d8fa;--result:#edf3f7;--result-ink:#15253c;--shadow:0 15px 45px #0002;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
html[data-theme=light]{color-scheme:light;--bg:#f3f5f6;--panel:#fff;--panel2:#e8eef3;--ink:#14243a;--muted:#4b6076;--line:#c9d4df;--lime:#365e00;--cyan:#006887;--result:#13253c;--result-ink:#f0f7fc;--shadow:0 15px 45px #14243a0a}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.65}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,select{cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}button,a,input,select,summary{touch-action:manipulation}a:hover{color:var(--cyan)}:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}button,input,select{border:1px solid var(--line);border-radius:8px;color:var(--ink);background:var(--panel2)}input,select{padding:10px;min-height:44px}input[type=number]{width:125px}input[type=checkbox]{min-height:auto;width:18px;height:18px;accent-color:#6a971b}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(32px,4.5vw,58px);line-height:1.08;letter-spacing:-.045em;font-weight:750}h2{font-size:clamp(24px,2.4vw,32px);line-height:1.2;letter-spacing:-.025em}h3{font-size:19px;line-height:1.35;letter-spacing:-.015em}svg{max-width:100%}.skip{position:absolute;top:-80px;left:20px;z-index:1000;background:var(--lime);color:var(--bg);padding:12px}.skip:focus{top:10px}.site-header{min-height:84px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:36px;padding:16px 36px;background:var(--bg);position:relative;z-index:20}.brand{font-size:26px;letter-spacing:-1px;display:flex;align-items:center;font-weight:750;gap:11px}.brand svg{width:39px;height:39px;color:var(--lime)}.brand-dot{font-size:12px;align-self:start;color:var(--cyan)}.top-nav{margin-left:auto;display:flex;gap:28px;font-size:14px}.header-controls{display:flex;gap:14px;align-items:center}.icon-button{width:44px;height:44px;font-size:24px;background:transparent}.languages{position:relative}.languages summary{list-style:none;border:1px solid var(--line);padding:9px 12px;border-radius:8px;min-height:44px;cursor:pointer}.languages summary::-webkit-details-marker{display:none}.language-list{position:absolute;right:0;top:54px;background:var(--panel);box-shadow:var(--shadow);border:1px solid var(--line);border-radius:12px;padding:8px;min-width:210px;display:grid;max-height:70vh;overflow:auto}.language-list a{padding:8px 14px}.language-list [aria-current=page]{color:var(--lime);background:var(--panel2);border-radius:6px}.site-shell{display:grid;grid-template-columns:220px minmax(0,1fr);max-width:1600px;margin:auto}.sidebar{border-right:1px solid var(--line);padding:32px 20px;min-height:70vh}.sidebar nav{display:grid;gap:7px}.sidebar nav a{display:flex;gap:12px;align-items:center;padding:12px 10px;border-radius:8px;font-size:14px;line-height:1.4}.sidebar nav a span{font-size:21px;width:25px;text-align:center;color:var(--cyan);flex-shrink:0}.sidebar nav a:hover,.sidebar nav [aria-current=page]{background:var(--panel2);color:var(--lime)}.micro,.eyebrow{font-family:ui-monospace,monospace;text-transform:uppercase;letter-spacing:.11em;font-size:11px;font-weight:600;color:var(--muted)}.micro{margin:0 10px 20px}.sidebar-note{border-top:1px solid var(--line);margin-top:48px;padding:24px 10px 10px;font-size:12px;color:var(--muted)}.sidebar-note strong{color:var(--ink);display:inline-block;margin:0 0 9px 6px}.status-dot{display:inline-block;width:7px;height:7px;border-radius:100%;background:var(--lime);box-shadow:0 0 0 4px color-mix(in srgb,var(--lime) 12%,transparent);margin-right:8px}.sidebar-method{font-size:12px;color:var(--cyan);margin-left:10px}main{min-width:0;padding:0 40px 56px}.hero{display:grid;grid-template-columns:1.12fr 1fr;gap:38px;padding:54px 0 42px}.hero-copy .eyebrow{margin-bottom:28px;color:var(--lime)}.hero h1{max-width:600px;margin-bottom:23px}.hero-text{color:var(--muted);max-width:570px;font-size:17px}.hero-links{display:grid;gap:9px;margin:26px 0 20px}.hero-links a{display:flex;justify-content:space-between;gap:12px;padding:13px 18px;background:var(--panel2);border:1px solid var(--line);border-radius:8px;font-weight:650}.hero-links a:first-child{background:var(--lime);border-color:var(--lime);color:var(--bg)}.hero-foot{font-size:12px;color:var(--muted)}.hero-instrument{align-self:center;transform:rotate(2deg);background:#15263c;color:#eaf4ff;border:1px solid #35465c;border-radius:14px;box-shadow:15px 20px 0 color-mix(in srgb,var(--cyan) 6%,transparent);overflow:hidden}.instrument-top{display:flex;align-items:center;justify-content:space-between;font:10px ui-monospace,monospace;padding:17px 18px;border-bottom:1px solid #344458;gap:9px}.instrument-top i{width:8px;height:8px;background:#c8f56b;border-radius:50%}.device-art{display:block;width:100%}.instrument-bottom{display:flex;justify-content:space-between;padding:18px 13px;border-top:1px solid #344458;gap:10px;font:10px ui-monospace,monospace;color:#77d8fa}.instrument-bottom b{display:block;color:#eaf4ff;font:12px/1.5 system-ui;margin-top:7px}.section{padding:32px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:24px}.section-heading h2{margin:0}.section-heading .eyebrow{margin-bottom:9px}.section-heading>a{font-size:13px;color:var(--cyan)}.problem-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.problem-grid a{display:flex;align-items:center;gap:17px;padding:19px;background:var(--panel);border:1px solid var(--line);border-radius:10px}.problem-grid strong{font-size:14px;flex:1}.problem-icon{font:18px ui-monospace,monospace;color:var(--lime);white-space:nowrap}.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.tool-card{display:flex;gap:16px;padding:23px;background:var(--panel);border:1px solid var(--line);border-radius:10px;transition:border-color .15s,transform .15s}.tool-card:hover{border-color:var(--cyan);transform:translateY(-2px);color:var(--ink)}.tool-card small{color:var(--cyan);font-size:11px}.tool-card h3{margin:7px 0 9px}.tool-card p{font-size:13px;color:var(--muted);margin:0}.card-number{font:12px ui-monospace,monospace;color:var(--muted);margin-top:5px}.arrow{color:var(--lime);margin-left:auto;font-size:20px}.search{font-size:12px;min-width:220px}.search span{display:block;margin-bottom:5px;color:var(--muted)}.search input{width:100%}.method-strip{margin-top:35px;padding:28px;background:var(--panel2);border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;gap:24px}.method-strip h2{font-size:23px}.method-strip p{color:var(--muted);font-size:14px;margin:0}.method-strip>a{color:var(--cyan);min-width:130px;font-size:13px}.method-icon{font-size:60px;line-height:1;color:var(--lime)}.site-footer{max-width:1600px;margin:auto;padding:38px 38px 28px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1.4fr;gap:28px;color:var(--muted);font-size:13px}.footer-brand{font-size:23px;font-weight:700;color:var(--ink)}.site-footer p{margin-top:10px;max-width:320px}.site-footer nav{display:flex;flex-wrap:wrap;align-content:start;gap:16px 24px}.site-footer small{grid-column:1/-1}.text-button{border:0;border-radius:0;background:none;padding:0;color:inherit;min-height:24px}.breadcrumbs{padding-top:24px;font-size:12px;color:var(--muted)}.breadcrumbs ol{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:8px;margin:0}.breadcrumbs li:not(:last-child):after{content:'/';margin-left:8px;color:var(--line)}.page-heading{padding:34px 0 26px;max-width:950px}.page-heading h1{font-size:clamp(30px,3.8vw,49px);margin-bottom:18px}.page-heading>p:last-child{color:var(--muted);font-size:17px;max-width:800px}.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:45px;padding-top:36px}.prose{max-width:760px;line-height:1.85;color:var(--muted)}.prose h2,.prose h3{color:var(--ink);margin:34px 0 14px}.prose h2{font-size:26px}.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}.prose li{margin-bottom:9px}.prose code{color:var(--ink);background:var(--panel2);padding:2px 6px;border-radius:4px;overflow-wrap:anywhere}.prose p{margin-bottom:19px}.reading-aside{border-left:1px solid var(--line);padding-left:23px;font-size:13px}.reading-aside>a{display:block;padding:15px 0;border-bottom:1px solid var(--line);color:var(--cyan)}.notice{padding:16px;background:var(--panel2);border-radius:8px;font-size:12px;color:var(--muted);margin-top:22px}.pagination{display:flex;gap:10px;margin:24px 0}.pagination a{padding:8px 15px;border:1px solid var(--line);border-radius:6px}.pagination [aria-current=page]{background:var(--lime);color:var(--bg)}.category-section{padding-top:0}
/* Measurement workbench */
.lab{border:1px solid var(--line);border-radius:14px;background:var(--panel);box-shadow:var(--shadow);overflow:hidden}.lab-top{padding:20px 24px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:15px}.lab-top strong{display:flex;align-items:center;font-size:14px}.state{font:12px ui-monospace,monospace;color:var(--muted)}.lab-controls{padding:18px 24px;display:flex;flex-wrap:wrap;gap:12px;align-items:end}.lab-controls label{font-size:12px;color:var(--muted);display:grid;gap:5px}.button,button.primary{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 19px;background:var(--lime);border:1px solid var(--lime);color:var(--bg);font-weight:700;border-radius:8px;line-height:1.4}.lab button:not(.primary){min-height:44px;padding:9px 16px}.lab button:hover:not(:disabled){filter:brightness(1.12)}.lab-help{font-size:13px;margin:0;padding:0 24px 20px;color:var(--muted)}.test-zone{margin:0 24px 20px;border:1px dashed var(--cyan);border-radius:10px;background:var(--bg);padding:24px;text-align:center;min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;position:relative;outline-offset:3px;user-select:none;-webkit-user-select:none}.test-zone.active{border-style:solid;border-color:var(--lime)}.test-zone.active:before{content:'';position:absolute;width:7px;height:7px;background:var(--lime);border-radius:50%;top:12px;right:12px}.test-zone:focus-visible{outline:3px solid var(--cyan)}.test-zone p{max-width:600px;margin:0;font-size:14px;color:var(--muted)}.mouse-diagram{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;width:180px;border:2px solid var(--cyan);padding:10px 10px 40px;border-radius:70px 70px 50px 50px}.mouse-diagram span{padding:14px 8px;border:1px solid var(--line);border-radius:15px;font:12px ui-monospace,monospace}.mouse-diagram span:nth-child(n+4){padding:5px}.mouse-diagram .pressed{background:var(--lime);color:var(--bg);border-color:var(--lime)}.result-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border-block:1px solid var(--line)}.metric{background:var(--result);color:var(--result-ink);padding:17px 20px;min-width:0}.metric strong{display:block;font:700 clamp(24px,3vw,38px)/1.3 ui-monospace,monospace;overflow-wrap:anywhere}.metric span{display:block;font-size:11px;margin-top:5px;line-height:1.4}.graph-wrap{padding:20px 24px}.graph-wrap canvas{width:100%;height:190px;display:block;background:#0b1422;border:1px solid #304159;border-radius:8px}.graph-caption{font-size:12px;color:var(--muted);margin:8px 0 0}.log{margin:0 24px 20px;max-height:180px;overflow:auto;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:12px;list-style:none;font:12px/1.8 ui-monospace,monospace;overflow-wrap:anywhere}.log li{border-bottom:1px solid var(--line);padding:3px}.result-status{padding:13px 24px;color:var(--cyan);font-size:13px;white-space:pre-line;min-height:48px}.report-tools{padding:18px 24px;border-top:1px solid var(--line);display:flex;gap:12px;flex-wrap:wrap;align-items:center}.report-tools label{font-size:12px;display:flex;gap:8px;align-items:center}.report-tools button{font-size:12px}.history{padding:0 24px 20px;font-size:12px}.history>div{border-bottom:1px solid var(--line);padding:10px 0;overflow-wrap:anywhere}.history button{margin-left:10px}.keyboard{width:100%;max-width:730px;display:grid;gap:5px;overflow-x:auto;padding:8px}.keyboard-row{display:flex;gap:4px;min-width:550px}.keycap{background:var(--panel2);border:1px solid var(--line);border-bottom-width:3px;min-width:30px;flex:1;padding:8px 2px;border-radius:5px;font:10px ui-monospace,monospace;text-align:center;color:var(--muted);position:relative}.keycap.seen{border-color:var(--cyan);color:var(--cyan)}.keycap.pressed{background:var(--lime);border-color:var(--lime);color:var(--bg)}.keycap[data-code=Space]{flex:5}.keyboard-data{font:12px ui-monospace,monospace;min-height:40px;overflow-wrap:anywhere;color:var(--cyan);width:100%}.controller-info{font:12px/1.7 ui-monospace,monospace;overflow-wrap:anywhere;color:var(--cyan);max-width:100%}.controller-buttons{display:flex;flex-wrap:wrap;gap:6px;justify-content:center}.pad-button{border:1px solid var(--line);border-radius:6px;padding:7px;font:11px ui-monospace,monospace;min-width:50px}.pad-button.pressed{background:var(--lime);color:var(--bg)}.axis-readout{font:12px/1.8 ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere}.stepper{display:flex;gap:6px;flex-wrap:wrap;padding:18px 24px 0}.stepper span{font-size:11px;padding:7px 10px;border:1px solid var(--line);border-radius:5px}.stepper .current{background:var(--lime);color:var(--bg)}.stepper .done{border-color:var(--cyan);color:var(--cyan)}.guided-intro{padding:18px 24px 0;font-size:14px;color:var(--muted)}.guided-intro select{margin:10px}.comparison{padding:0 24px 22px;font-size:13px;overflow:auto}.comparison table{width:100%;border-collapse:collapse}.comparison th,.comparison td{padding:10px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}.comparison caption{text-align:left;padding:12px 0;font-weight:700}.calculation{padding:10px 24px 25px;font-size:13px;color:var(--muted)}.formula{font:16px ui-monospace,monospace;padding:18px;background:var(--bg);border:1px solid var(--line);border-radius:8px}.export-sheet{display:none}.cms-cookie-banner{font-family:inherit!important}.cms-cookie-banner:focus-within{outline:2px solid #77d8fa}.tool-card[hidden],[hidden]{display:none!important}
.distribution,.axis-stats,.next-key-note{font-size:12px;color:var(--muted);overflow-wrap:anywhere}.keycap.next-key{box-shadow:0 0 0 2px var(--cyan)}
@media(min-width:1440px){main{padding-left:55px;padding-right:55px}.hero{gap:65px}}@media(max-width:1100px){.site-shell{grid-template-columns:175px minmax(0,1fr)}.sidebar{padding:26px 12px}main{padding-inline:25px}.hero{gap:25px}.hero h1{font-size:43px}.reading-layout{grid-template-columns:minmax(0,1fr)}.reading-aside{border-left:0;border-top:1px solid var(--line);padding:20px 0;display:grid;grid-template-columns:1fr 1fr;gap:10px}.reading-aside .eyebrow{grid-column:1/-1}.tool-card{padding:18px}.card-number{display:none}.lab-controls{padding-inline:18px}.lab-help{padding-inline:18px}}
@media(max-width:800px){.site-header{padding:16px 20px;gap:16px}.top-nav{display:none}.header-controls{margin-left:auto}.site-shell{display:block}.sidebar{min-height:0;border-right:0;border-bottom:1px solid var(--line);padding:10px 20px}.sidebar .micro,.sidebar-note,.sidebar-method{display:none}.sidebar nav{display:flex;overflow-x:auto;gap:7px;padding:3px 2px 8px}.sidebar nav a{white-space:nowrap;border:1px solid var(--line);padding:9px 12px;font-size:12px}.sidebar nav a span{font-size:16px;width:auto}.hero{padding-top:35px}.hero h1{font-size:40px}.hero-text{font-size:15px}.hero-instrument{transform:none}.tool-card h3{font-size:17px}.method-strip{flex-wrap:wrap}.method-strip>a{margin-left:52px}.result-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.metric strong{font-size:29px}.page-heading{padding-top:27px}.site-footer{padding:30px 24px}.keyboard{padding:4px}}
@media(max-width:580px){body{font-size:14px}.site-header{padding:13px 16px;min-height:74px}.brand{font-size:22px;gap:7px}.brand svg{width:31px;height:31px}.header-controls{gap:7px}.languages summary{padding-inline:9px}.icon-button{width:40px}.brand-dot{display:none}main{padding:0 18px 35px}.hero{grid-template-columns:1fr;gap:25px;padding-bottom:22px}.hero h1{font-size:45px}.hero-instrument{max-width:360px;width:100%;justify-self:center}.device-art{max-height:210px}.instrument-top{font-size:9px}.instrument-bottom{padding:13px}.hero-copy .eyebrow{margin-bottom:22px}.problem-grid,.tool-grid{grid-template-columns:1fr}.section-heading{align-items:start;flex-direction:column;gap:17px}.section-heading .search{width:100%}.section{padding:25px 0}.problem-grid a{padding:17px}.tool-card{padding:20px}.card-number{display:block}.method-strip{padding:22px;gap:15px}.method-icon{font-size:42px}.method-strip h2{font-size:22px}.method-strip>a{margin-left:0}.site-footer{grid-template-columns:1fr}.site-footer small{grid-column:auto}.reading-layout{padding-top:15px}.reading-aside{grid-template-columns:1fr}.page-heading h1{font-size:35px}.lab-top{padding:16px}.lab-controls{padding:15px;gap:10px}.lab-controls label{flex:1;min-width:115px}.lab-controls input,.lab-controls select{width:100%;max-width:100%}.lab-controls button{flex-grow:1}.test-zone{margin:0 15px 15px;padding:15px 7px;min-height:190px}.graph-wrap{padding:16px}.log{margin-inline:15px}.report-tools{padding:15px}.result-status{padding-inline:15px}.metric{padding:16px}.reading-layout{gap:20px}.prose h2{font-size:24px}.keyboard-row{min-width:520px}.keyboard{max-width:100%}.stepper{padding-inline:15px}.comparison{padding-inline:15px}.breadcrumbs{font-size:11px}.hero-links a{min-height:52px}.lab button:not(.primary){padding:10px 12px}.instrument-bottom b{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}.tool-card:hover{transform:none}}
@media print{body{background:#fff;color:#000}.site-header,.sidebar,.site-footer,.breadcrumbs,.page-heading,.reading-layout,.lab-top,.lab-controls,.lab-help,.test-zone,.result-grid,.graph-wrap,.log,.report-tools,.stepper,.guided-intro,.history,.comparison,.result-status,#cms-cookie-banner{display:none!important}.site-shell{display:block}main{padding:0}.lab{border:0;box-shadow:none}.export-sheet{display:block;white-space:pre-wrap;font:12px/1.65 system-ui;color:#000}.export-sheet h1{font-size:24px;letter-spacing:0}.export-sheet p{margin:10px 0}.export-sheet pre{font:12px/1.6 system-ui;white-space:pre-wrap}}
h1{text-wrap:balance}.controller-outline{width:280px;max-height:130px;color:var(--cyan)}.calculator-results{grid-template-columns:repeat(3,minmax(0,1fr))}